Recalling Security Council resolution 425 (1978), 426 (1978) and the ensuing resolutions, and more particularly, Security Council resolution 501 (1982),

Taking note of the letters of the Permanent Representative of Lebanon dated 4 June 1982 (S/15161 and S/15162),

Deeply concerned at the deterioration of the present situation in Lebanon and in the Lebanese-Israeli border area, and its consequences for peace and security in the region,

Gravely concerned at the violation of the territorial integrity, independence, and sovereignty of Lebanon,

Reaffirming and supporting the statement made by the President and the members of the Security Council on 4 June 1982 (S/15163), as well as the urgent appeal issued by the Secretary-General on 4 June 1982,

Taking note of the report of the Secretary-General,

1. Calls upon all the parties to the conflict to cease immediately and simultaneously all military activities within Lebanon and across the Lebanese-Israeli border and no later than 0600 hours local time on Sunday, 6 June 1982;

2. Requests all Member States which are in a position to do so to bring their influence to bear upon those concerned so that the cessation of hostilities declared by Security Council resolution 490 (1981) can be respected;

3. Requests the Secretary-General to undertake all possible efforts to ensure the implementation of and compliance with this resolution and to report to the Security Council as early as possible and not later than forty-eight hours after the adoption of this resolution.